Demountable rim.



0. w'. MOU..

DEMouNTABLE am, APPLICATION FILED EC. II. |915.l

1,248,837, ranma Dec. 4,1911'.

UNITED sTATEs PATENT oFEIoE.

ons w. More, or JACKSON', MICHIGAN, Assmann or onnnxtr are JACKSON' am COMIPANY, 0F JACKSON, MICHIGAN, A CORPORATION 0F MICHIGAN, AND ONE-HALF TO DETROIT DEMOUNTABLE RIM G0.,. 0F DETROIT, MICHIGAN, A CORPORATION OF MICHIGAN.

DEMOUNTABLE mM.

.mannerwvell understood in the art.

Specification of Letters Patent.

To all 'whom t may concern:

Be .it known that l,`()'ris W. Mo'rr, a citizen of theI United States, and :i resident of Jackson, in the county of Jackson and State of Michigan, have invented certain new and useful Improvements in l)emoun,iable Rims, of which the following is a full, clear, and exact description.

The invention relates to demountable rims` for pneumatic tires, and more partienlarly lto locking devices employed for ,s1-,curing together the ends of a transversely split rim. y

One object oi the invention is to provide a locking device which is simple in cons-ztrucH tion., ell'icient in operation, and which can be produced at a low cost; V

A further object of the invention is to provide an improved locking device which is disposed entirely between the tire rim and the felly band of the wheel, which comprises members rigidly on the rim ends respectively, and in which provision is made for interlocking the rim ends against relative radial movement. l

The invention consists in. the several novel features of.`construction hereinafter set forth and more particularly defined by claims at the conclusion hereo In the drawings-z: Figure 1 is a perspective of the inner face of a portion of a rim and felly band, embodying the invention. Fig. is a longitudinal section of the rim in operative position upon a portion of the wheel. Fig. 3 is a transverse section taken at a Vpoint where the rim is secured on the wheel by a wedge-lug.

The rim'is formed of a band 10 adapted to fit around a wheel-body, and to be secured thereon Vby wedges and bolts in a This band .isprovided with integral tire-engaging flanges `11 which `may be formed to fit any of the weil known forms of pneumatic tires. To

facilitate piaeement of the rim within the tire,

and the removal therefrom, the rim is transversely split at one point to permit inward and lateral flexing of one end ofthe rim away fromthe tire, and this split is formed by a diagonal cut 412 extending partlally across the rim to a oint 14 vand thence substantially at a rig t angle to the side of the rim, as at 17, forming in eiect., an obtuse angular transverse 4split'in the run.

l l Patented Dec. 4, 1917.

Application liled Deeembei 17, 1915. Serial No. 67,304.

'.l`he'iinprowd locking device comprises a plate 1H which is rigidly secured to the inner 'l'acc of one end of the rim by rivets iii, extending through .the base of the band l() and a rectangular plate or lu 20 which is rigidly secured to the inner ace of the other end of hand 10 by rivets 22, which may be integral with said plate and extend through said band. Plate 18 is secured to theI inner face of one end ortion of the base of the band 10 and projects l0ngitudinally therefrom across the split to underlie the other end portion of the band, and is formed in one of its sides with an opening. or recess 23 adapted to extend around the ends and one side ofthe plate 20. The ends of plate 20 are dovetailed or divergent from the band and the edges of recess 23 are correspondingly inclined and divergent to form an interlocking connection between the rim ends whereby, when the lock members are in engagement, the rim ends will be secured against relative radiahmovement.

- In practice, Vthe recess 23 is slightly longer than the plate 20, sc tbat there will be a slight lost motion or longitudinal play between the plates of-theinterlocking device. This play is sufficient to permit the plates to be separated by relative lateral movement when the rim is not subjected to contracting pressure ot' the tire or to the expanding pressure of the lugs `for securin the lrim to a wheel. lVhen the rim has een placed within a tire, and the tire is infiated, the rim is usually contracted by the tire suieiently to force the two contiguous edges of plate 20 and recess 23 nearest the split into so that when the 'rim is being carried with an infiated tire as a'spare rim, the rim-ends will be held against relative radial movement byy theinterlock caused by the "pressure ofthe tire.

When the rim is laced on a wheel and secured thereon by t e usual wedge lugs Q4 which extend` between the felly band 26 of the'wheel and ther-im, and nuts 25 on bolts if?, the lugs exert an expanding pressure upon the split-rim which will cause the rim to expand slightly and bring the contiguous dovet-ailed edges Iof plate 20' and recess 23 farthest from the split'into radially interlocking engagement, As a. result, the locking device will serve to secure the rim ends against relative radial movement, both .when the rim ends are subjected tocontracting pressure of the tire and when the .rim is end first placed around the tire. Next, the

-stantial contracting or expanding pressureother end, when released, springs Within the tire and, then the plate 18 will be guided laterally into position around the plate 20, so that the latter plate will enter and be dis osed in openin 23 of plate 18.

, heslight play etvveen the plate facilitates this connection` of the locking members. When the tire is inflated and is carried as a spare, the pressure in the tire Will exert a contracting pressure upon the rim, so that the contiguous edges. of plate 20 and recess 23 nearest the split will be forced into interlocking engagement, thus holding the rim ends against relative radial movement. When the rim is applied to a Wheel for use on a vehicle, the wedge-bolts exert an expanding pressure upon the rim and tend to force the rim ends apart until the contiguous edges of plate 20 and recess 23 farthest y from the split are'forced into interlocking enga-gement. In such relation the locking device positively limits the expansion of the rim by the Wedge-lugs and forms a radially interlocking connection torretain the rimends longitudinally alined. As a result, any outward radial pressureexerted upon one rim end by one of the Wedge-lugs Will be transmitted `vto both rim ends through this dovetailed connection.

When the irre is deflated, there is no subupon the rim, so that one of the rim ends may be easily sprung inwardly and laterally to facilitate removal of therim from the tire.

An opening is formed adjacent one of the I rim ends. anda hollow stud or rivet 31 isA secured therein to receive the nipple containingthe valve' for the tire. One end of plate 18 is cut offat its corners, as at 31 and 32, to vfit into a driving plate 33 which `The invention thus exemplifies an improved locking device for securing the ends rof a split rim together, which is simple in k being formed vto has one of its ends formed to 'receiveI the f is bein carried as a spare, and when it isV secure 0n a wheel.

The invention is not to be understood as restricted to the details set forth, since these may be modified within the'scope of the appended claims, without departing from the spirit and scope of the invention.

Having thus described the invention, what I claim as new and desire to secure by Letters Patent is:

1. The combination with a transversely split tire-carrying rim, of a` locking device for securing the rim-ends together, comprising plates fixed on the inner faces of the rim-ends respectively, one of said plates be-' ing formed vvith an opening to receive the other'plate, said plates having interfitting contiguous edges for securing the rim-ends against relative radial movement.

2. The combination with a transversely split tire-carrying rim, of a locking device for securing the rim-ends together, comprising a pair of plates rigidly secured to the inner faces of the rim-ends respectively, one

of said'plates having an open sided slot for receiving the other plate, said plates having intcrfittingy contlguous edges to'secure the rim-ends against relative radial movement.

-3. The combination with a transversely split tire-carrying rim, of a locking device for securing the 1imends-together, comprising plates,V fixed on the inner faces'of the rim-ends respectively, one of said plates being formed with an opening to receive the other plate, said plates having interfitting contiguous edges for securing the rim-ends against relative radial movement, said plates being separable by 'relative lateral movement.

4. `The combination with a transversely split tire carrying-rim, of a locking device for securing the rim-ends together, comprising apair of plates rigidly. secured to fthe inner faces of the rim-ends,- respectively, the edges of the opening and the plate therein against relative radial movement when the rim is expandedV or contracted, the opening permit the plates to be separated by relative lateral movement. 4'

oTIs Wl MoTT.`

` Witnesses:

MILDIED STMPF, KATHA'RINE GnRLAcl-r.

being doveta-iled to secure the rim ends. 

